diff --git a/package-lock.json b/package-lock.json
index 86405d68..eb1d84ee 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -16,6 +16,7 @@
         "@ts-common/source-map": "0.5.0",
         "@ts-common/string-map": "0.3.0",
         "autorest": "^3.8.0",
+        "fast-deep-equal": "^3.1.3",
         "js-yaml": "^4.1.0",
         "json-pointer": "0.6.2",
         "json-refs": "^3.0.15",
@@ -3345,7 +3346,6 @@
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
       "integrity": "sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/fast-json-stable-stringify": {
diff --git a/package.json b/package.json
index 4dcc010a..2d185baa 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,7 @@
     "@ts-common/source-map": "0.5.0",
     "@ts-common/string-map": "0.3.0",
     "autorest": "^3.8.0",
+    "fast-deep-equal": "^3.1.3",
     "js-yaml": "^4.1.0",
     "json-pointer": "0.6.2",
     "json-refs": "^3.0.15",
diff --git a/src/lib/util/resolveSwagger.ts b/src/lib/util/resolveSwagger.ts
index adac48f7..45bbfa6a 100644
--- a/src/lib/util/resolveSwagger.ts
+++ b/src/lib/util/resolveSwagger.ts
@@ -6,6 +6,7 @@ import { toArray } from "@ts-common/iterator"
 import { cloneDeep, Data, FilePosition, getFilePosition, getInfo, getPath, ObjectInfo } from "@ts-common/source-map"
 import * as sourceMap from "source-map"
 import * as sm from "@ts-common/string-map"
+import equal from "fast-deep-equal"
 import { readFileSync, writeFileSync } from "fs"
 import * as path from "path"
 import { pathToJsonPointer } from "./utils"
@@ -247,7 +248,7 @@ export class ResolveSwagger {
       if (allOfSchema.properties) {
         sm.keys(allOfSchema.properties).forEach(key => {
           if (sm.keys(schemaList).some(k => k === key)) {
-            if (!this.isEqual(allOfSchema.properties[key], schemaList[key])) {
+            if (!this.isEqual(allOfSchema.properties[key], schemaList[key]) && !equal(allOfSchema.properties[key], schemaList[key])) {
               const allOfProp = allOfSchema.properties[key]
               const allOfPath = getPath(getInfo(allOfProp) as ObjectInfo)
               const allOfOriginalPosition = this.map.originalPositionFor(getFilePosition(allOfProp) as FilePosition)
diff --git a/src/test/incompatiblePropertiesTest.ts b/src/test/incompatiblePropertiesTest.ts
index 7cf13e32..dc2e16aa 100644
--- a/src/test/incompatiblePropertiesTest.ts
+++ b/src/test/incompatiblePropertiesTest.ts
@@ -3,6 +3,14 @@ import * as path from "path"
 import { OpenApiDiff } from ".."
 import { fileUrl } from "./fileUrl"
 
+test.each(["different-names", "duplicate-names", "reference-equals", "structural-equals"])("should pass for %s", async testName => {
+  const diff = new OpenApiDiff({})
+  const file = `src/test/specs/incompatible-properties/${testName}.json`
+
+  // expected to pass
+  await diff.compare(file, file)
+})
+
 // This test is part of regression test suite for https://github.com/Azure/azure-sdk-tools/issues/5981
 // Given a property with given type and name
 // When another property with the same name but an incompatible type is referenced
diff --git a/src/test/specs/incompatible-properties/common-types.json b/src/test/specs/incompatible-properties/common-types.json
new file mode 100644
index 00000000..dc7b6474
--- /dev/null
+++ b/src/test/specs/incompatible-properties/common-types.json
@@ -0,0 +1,18 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "title": "common-types",
+    "version": "1.0"
+  },
+  "paths": {},
+  "definitions": {
+    "Foo": {
+      "type": "object",
+      "properties": {
+        "p1": {
+          "type": "string"
+        }
+      }
+    }
+  }
+}
diff --git a/src/test/specs/incompatible-properties/different-names.json b/src/test/specs/incompatible-properties/different-names.json
new file mode 100644
index 00000000..5f4e7b86
--- /dev/null
+++ b/src/test/specs/incompatible-properties/different-names.json
@@ -0,0 +1,31 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "title": "different-names",
+    "version": "1.0"
+  },
+  "paths": {},
+  "definitions": {
+    "Bar": {
+      "type": "object",
+      "properties": {
+        "p1": {
+          "type": "string"
+        }
+      },
+      "allOf": [
+        {
+          "$ref": "./common-types.json#/definitions/Foo"
+        }
+      ]
+    },
+    "Baz": {
+      "type": "object",
+      "properties": {
+        "p1": {
+          "type": "object"
+        }
+      }
+    }
+  }
+}
diff --git a/src/test/specs/incompatible-properties/duplicate-names.json b/src/test/specs/incompatible-properties/duplicate-names.json
new file mode 100644
index 00000000..1cba0803
--- /dev/null
+++ b/src/test/specs/incompatible-properties/duplicate-names.json
@@ -0,0 +1,31 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "title": "duplicate-names",
+    "version": "1.0"
+  },
+  "paths": {},
+  "definitions": {
+    "Bar": {
+      "type": "object",
+      "properties": {
+        "p1": {
+          "type": "string"
+        }
+      },
+      "allOf": [
+        {
+          "$ref": "./common-types.json#/definitions/Foo"
+        }
+      ]
+    },
+    "Foo": {
+      "type": "object",
+      "properties": {
+        "p1": {
+          "type": "object"
+        }
+      }
+    }
+  }
+}
diff --git a/src/test/specs/incompatible-properties/reference-equals.json b/src/test/specs/incompatible-properties/reference-equals.json
new file mode 100644
index 00000000..b3b77ea9
--- /dev/null
+++ b/src/test/specs/incompatible-properties/reference-equals.json
@@ -0,0 +1,37 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "title": "structural-equality",
+    "version": "1.0"
+  },
+  "paths": {},
+  "definitions": {
+    "Foo": {
+      "type": "object",
+      "properties": {
+        "bar": {
+          "$ref": "#/definitions/MyObject"
+        }
+      },
+      "allOf": [
+        {
+          "$ref": "#/definitions/Foo2"
+        }
+      ]
+    },
+    "Foo2": {
+      "type": "object",
+      "properties": {
+        "bar": {
+          "$ref": "#/definitions/MyObject"
+        }
+      }
+    },
+    "MyObject": {
+      "type": "object",
+      "additionalProperties": {
+        "type": "string"
+      }
+    }
+  }
+}
diff --git a/src/test/specs/incompatible-properties/structural-equals.json b/src/test/specs/incompatible-properties/structural-equals.json
new file mode 100644
index 00000000..641f80c9
--- /dev/null
+++ b/src/test/specs/incompatible-properties/structural-equals.json
@@ -0,0 +1,37 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "title": "structural-equality",
+    "version": "1.0"
+  },
+  "paths": {},
+  "definitions": {
+    "Foo": {
+      "type": "object",
+      "properties": {
+        "bar": {
+          "type": "object",
+          "additionalProperties": {
+            "type": "string"
+          }
+        }
+      },
+      "allOf": [
+        {
+          "$ref": "#/definitions/Foo2"
+        }
+      ]
+    },
+    "Foo2": {
+      "type": "object",
+      "properties": {
+        "bar": {
+          "type": "object",
+          "additionalProperties": {
+            "type": "string"
+          }
+        }
+      }
+    }
+  }
+}